#E3373F
Closest named color: Imperial Red (#E63946). oklch(60.4% 0.208 23.9), rgb(227, 55, 63).
Aa
Black text reads best on this color (4.88:1).
About this color
#E3373F is a medium-dark, vivid red. In OKLCH its lightness is 60%, its chroma 0.208 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Imperial Red (#E63946), ΔE 0.010 away. Black text reads best on it, at 4.88:1.
| Hue family | Reds |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.208) |
| Temperature | warm |
| Nearest name | Imperial Red (#E63946) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #E3373F |
| RGB | rgb(227, 55, 63) |
| HSL | hsl(357, 75%, 55%) |
| OKLCH | oklch(60.4% 0.208 23.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #E3373F | 4.29:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #E3373F | 4.88:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #E3373F text on white | 4.29:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #E3373F text on black | 4.88:1 | AA | Lc -33.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#FFF2F1
oklch(97.1% 0.014 22.8)
-
Step 100
100
#FDE3E0
oklch(93.6% 0.029 25.6)
-
Step 200
200
#FDCBC7
oklch(88.5% 0.057 23.6)
-
Step 300
300
#FCA7A1
oklch(81% 0.102 24)
-
Step 400
400
#F5726E
oklch(70.7% 0.162 23.8)
-
Step 500
500 (this color)
#E3373F
oklch(60.4% 0.208 23.9)
-
Step 600
600
#D80028
oklch(55.6% 0.225 24)
-
Step 700
700
#B70021
oklch(49.2% 0.199 23.8)
-
Step 800
800
#970019
oklch(42.6% 0.172 23.9)
-
Step 900
900
#7A141B
oklch(37.8% 0.136 23.7)
-
Step 950
950
#480F10
oklch(27% 0.086 24.2)
#E3373F with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #6B623E | 0.226 |
| Deuteranopia (no green cones) | #968739 | 0.206 |
| Tritanopia (no blue cones) | #FA003C | 0.048 |
| Achromatopsia (no color) | #7A7A7A | 0.209 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #E3373F
#E3373F
oklch(60.4% 0.208 23.9)
- #00939E
#00939E
oklch(60.5% 0.103 204.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #E3373F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Imperial Red #E63946 ΔE 0.010
- Red Pantone #EF233C ΔE 0.025
- Faded Red #D3494E ΔE 0.035
- Tomato Red #EC2D01 ΔE 0.038
- Crimson #DC143C ΔE 0.039
- Pale Red #D9544D ΔE 0.043
- Cherry Red #F7022A ΔE 0.043
- Vermillion #F4320C ΔE 0.045
Use #E3373F in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.